首页> 外文会议>American Radio Relay League,Inc.(ARRL) and Tucson Amateur Packet Radio(TAPR) Digital Communications Conference; 20040910-12; Des Moines,IA(US) >A PRACTICAL EVALUATION AND COMPARISON OF SOME MODERN DATA MODES as applied to THEIR POTENTIAL FOR UK-WIDE AMATEUR EMERGENCY DATA BROADCASTS
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A PRACTICAL EVALUATION AND COMPARISON OF SOME MODERN DATA MODES as applied to THEIR POTENTIAL FOR UK-WIDE AMATEUR EMERGENCY DATA BROADCASTS

机译:一些现代数据模式在英国范围内业余数据广播中的潜力的实用评估和比较

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This report aims to make recommendations for the use of modern data modes when considered for the purpose of broadcasting textual information (few transmitters to many receivers) over Amateur Radio HF paths. In recent years, the advent of Digital Signal Processing (DSP) using the soundcard of a standard home computer has enabled great advances in the control of the sound spectrum. Principally, the techniques of audio signal manipulation and filtering have moved from external mechanical devices to software control directly within the computer. Such advances have led to the development of several new data transmission modes that perform well over HF radio paths. Much of the software is freely available and simple to operate by the Radio Amateur, using modest equipment at home or in the field [see Figure 1]. The advantages of the newer data modes over the older include: greater speed and accuracy for a given spectral bandwidth, improved robustness against all types of interference, a more compact set-up and much better marginal signal performance. It is suggested that these modern data modes could find an application in amateur emergency HF communications. The possibility of 'broadcasting' messages and information is of interest here. For example, it may be possible to provide a UK-wide service from a single, or a few, well-appointed stations. Because of the comparative ease with which an HF data receive-only facility can be established at temporary locations, a national information system might be an achievable goal for radio amateurs. Such a facility might, for example, carry low-precedence traffic in order to free official channels for more important messages.
机译:本报告旨在为在业余无线电HF路径上广播文本信息(很少有发射机发送给许多接收机)的目的而考虑使用现代数据模式提出建议。近年来,使用标准家用计算机的声卡的数字信号处理(DSP)的出现使声谱控制取得了长足的进步。原则上,音频信号处理和滤波技术已从外部机械设备转移到直接在计算机内部进行软件控制。这些进步导致了几种新的数据传输模式的发展,这些模式在HF无线电路径上表现良好。许多软件是免费提供的,而且业余无线电公司可以在家中或野外使用适当的设备进行简单操作[见图1]。与旧的数据模式相比,新的数据模式的优势包括:在给定的频谱带宽下,速度和准确性更高;针对所有类型干扰的鲁棒性得到了提高;设置更为紧凑;边际信号性能更高。建议这些现代数据模式可以在业余紧急HF通信中找到应用。在这里,“广播”消息和信息的可能性令人关注。例如,可以从一个或几个设备齐全的站点提供英国范围的服务。由于可以在临时位置建立仅接收HF数据的设施比较容易,因此对于业余无线电爱好者来说,国家信息系统可能是可以实现的目标。例如,这样的设施可能会携带低优先级的流量,以便释放官方渠道来发送更重要的消息。

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